When temperatures climb above 95°F, HVAC systems work harder than at any other time of the year. Unfortunately, this is also when most air conditioners fail.
Here are the 5 most common reasons your AC may stop cooling—and what you can do before it turns into an expensive repair.
1️⃣ Dirty Air Filter
A clogged filter restricts airflow, forcing your system to work much harder.
Tip: Replace your filter every 1–3 months, especially during summer.
2️⃣ Dirty Outdoor Condenser
Leaves, dust, and debris reduce heat transfer, making your AC run longer while cooling less.
Tip: Keep at least 2 feet of clearance around your outdoor unit.
3️⃣ Low Refrigerant
If your home isn’t cooling like it used to, low refrigerant could be the cause.
Signs include:
✔ Warm air from vents
✔ Ice on refrigerant lines
✔ Long cooling cycles
✔ Higher energy bills
4️⃣ Thermostat Problems
Sometimes the HVAC system isn’t the issue at all.
Check:
• Cooling mode is ON
• Temperature is set correctly
• Batteries are fresh
• Wi-Fi thermostat is connected
5️⃣ Lack of Preventive Maintenance
Small problems become major repairs when ignored.
A professional inspection can identify:
- Worn capacitors
- Weak motors
- Refrigerant leaks
- Electrical issues
- Dirty evaporator coils
Fixing these early can help avoid costly breakdowns.
💡 Pro Tip
If your AC is constantly running but your home still feels warm, don’t keep lowering the thermostat. That won’t make your system cool faster—it only makes it work longer and increases wear.
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